I remember it ShoNuff and you are correct on the jump, first groove on the top of the bullet or a minimum of . 050 jump, the Barnes needs to build a little speed before they hit the lands and the STW loves bullet jump as rule anyway and as 7 said smoke your shoulder if you don’t have gage and set your die until you see a faint ring and that will be an .002 bump roughlySammy, I forget the exact measure, but I'm sure it was at the first groove in the top of the bullet. They like to jump, and can't be seated like a lead core bullet. My rifles shot that bullet like a 22.250 on steroids. My velocity was 3460, chronographed. I think I was at 3.620, so you are there, or abouts. I was shooting RL25, at 81 grains, 215GMM, WINCHESTER brass. IIt used to be good years ago, now it's junk.
Some of the secret was to back off your resizer, and adjust the bump, and sorta set it up to headspace on the shoulder, or at least let it do some of the support. Sometimes hsve to make small changes, when you find it, it will give you goosebumps. My chamber was very tight also. Bought a PTG reamer, and rechambered a stainless fluted seven mag barrel. THAT thing would shoot!
There's a pic back in the archives here somewhere!
My pal, Butterbean remembers it! Yours will come around!